package org.activiti.bpmn.model;

import java.util.List;
import java.util.Map;

/**
 * interface for accessing Element attributes.
 *
 * @author Martin Grofcik
 */
public interface HasExtensionAttributes {
    /**
     * get element's attributes
     */
    Map<String, List<ExtensionAttribute>> getAttributes();

    /**
     * set all object's attributes
     */
    void setAttributes(Map<String, List<ExtensionAttribute>> attributes);

    /**
     * return value of the attribute from given namespace with given name.
     *
     * @param namespace
     * @param name
     * @return attribute value or null in case when attribute was not found
     */
    String getAttributeValue(String namespace, String name);

    /**
     * add attribute to the object
     */
    void addAttribute(ExtensionAttribute attribute);
}
